interface SpeakHello{
    void speak();
}
class HelloMachine {
    public void turnOn(SpeakHello hello){
        hello.speak();
    }
}
public class Example7_3{
   public static void main(String args[]){
     HelloMachine machine = new HelloMachine ();
     machine.turnOn(new SpeakHello(){
                                        public void speak(){
                                           System.out.println("hello,you are welcome!");
                                        }
                                    }
                                   );
     machine.turnOn(new SpeakHello(){
                                        public void speak(){
                                           System.out.println("你好 ,欢迎光临 !");
                                        }
                                    }
                                   );
     }
}
                                   
